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T1 Phonebook Configuration MultiVOIP User Guide
278
Configuring the MVP2400/2410
MultiVOIP Phonebooks
When a VoIP serves a PBX system, it’s important that the operation of the
VoIP be transparent to the telephone end user. That is, the VoIP should not
entail the dialing of extra digits to reach users elsewhere on the network that
the VoIP serves. On the contrary, VOIP service more commonly reduces
dialed digits by allowing users (served by PBXs in facilities in distant cities) to
dial their co-workers with 3-, 4-, or 5-digit extensions as if they were in the
same facility.
Furthermore, the setup of the VoIP generally should allow users to make calls
on a non-toll basis to any numbers accessible without toll by users at all other
locations on the VoIP system. Consider, for example, a company with VOIP-
equipped offices in New York, Miami, and Los Angeles, each served by its
own PBX. When the VOIP phone books are set correctly, personnel in the
Miami office should be able to make calls without toll not only to the
company’s offices in New York and Los Angeles, but also to any number
that’s local in those two cities.
To achieve transparency of the VoIP telephony system and to give full access
to all types of non-toll calls made possible by the VOIP system, the VoIP
administrator must properly configure the “Outbound” and “Inbound” phone-
books of each VoIP in the system.
The “Outbound” phonebook for a particular VoIP unit describes the dialing
sequences required for a call to originate locally (typically in a PBX in a
particular facility) and reach any of its possible destinations at remote VoIP
sites, including non-toll calls completed in the PSTN at the remote site.
The “Inbound” phonebook for a particular VoIP unit describes the dialing
sequences required for a call to originate remotely from any other VOIP sites
in the system, and to terminate on that particular VOIP.
Briefly stated, the MultiVOIP’s Outbound phonebook lists the phone stations it
can call; its Inbound phonebook describes the dialing sequences that can be
used to call that MultiVOIP and how those calls will be directed. (Of course,
the phone numbers are not literally “listed” individually, but are, instead,
described by rule.)
Consider two types of calls in the three-city system described above: (1) calls
originating from the Miami office and terminating in the New York
(Manhattan) office, and (2) calls originating from the Miami office and
terminating in New York City but off the company’s premises in an adjacent
area code, an area code different than the company’s office but still a local call
from that office (e.g., Staten Island).